added courtesy_sleep()
lhashtable: print filename
memory allocator, ribs_malloc, ribs_free
added dep on ribs2 lib
moved ribs_freeall to context
ribify.c ribs_* ==> _ribified_*

in order to avoid naming conflict
ribify.h removed -- not needed
added ribs_*sleep() facility
moved malloc, support ribified realloc
sprintf, strdup, memdup in ribs malloc
thumb2 instruction set
tiny framework for timer
shorter way to specify syms to ribify